不同类别烟花爆竹仓库应考虑（）。
A、分区布置
B、集中布置
C、分散布置
参考答案：A
方程x2=2x的解是[ ]
A、0
B、2
C、0，-2
D、0，2
---Peter , where did you guys go for the summer vacation?
----We________ busy with our work for months, so we went to the beach to relax ourselves.
A．were
B．have been
C．had been
D．will be
